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https://issues.apache.org/jira/browse/HIVE-9045?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Xuefu Zhang updated HIVE-9045:
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Issue Type: Sub-task (was: Bug)
Parent: HIVE-7292
> Choosing right preference between map join and bucket map join [Spark Branch]
> -----------------------------------------------------------------------------
>
> Key: HIVE-9045
> URL: https://issues.apache.org/jira/browse/HIVE-9045
> Project: Hive
> Issue Type: Sub-task
> Components: Spark
> Reporter: Xuefu Zhang
>
> Currently We convert a join to bucket map join only after it's converted to
> map join. Supposedly, however, bucket map join has a smaller memory print, so
> a join which doesn't fit to map join might be suitable for a bucket map join.
> It would be good if we can take this into consideration when applying join
> optimizations.
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